Hello and sorry its a bit complicated for my first post,
I am trying to rebuild a controller to drive two air solenoids. They are for turning targets at our local shooting range.
It will need to drive the face solenoid for about second while timing for a preset but variable amount (2-30s hoping to set with pot).
When this timer has expired drive the away solenoid for about a second while timing for a variable but preset amount (again 2-30s hoping to adjust with a pot).
When the second time expires it goes back and starts the first time.
Robbing ideas from the original system, I was thinking about a monostable multivibrator for the timing (page5 fig 15 of datasheet variable resistors to rx1 and rx2):
http://uk.rs-online.com/web/search/...thod=searchProducts&searchTerm=cd4098&x=0&y=0
Using a darlington array to drive the solenoids using the notQ outputs from the above timer:
http://uk.rs-online.com/web/search/searchBrowseAction.html?method=getProduct&R=0527883
I was going to use 555 timers but this idea looks much better but I have little expierence of cmos circuits. Is there anything I should look out for or be careful of? other than electrostatic precautions?
I have 24 volts which is also used to drive the solenoids but dont have the solenoid details just yet.
I think thats all the details Ive been trying to think of the best way to do this for a while has anyone got a better idea?
cheers
Hannsg
I am trying to rebuild a controller to drive two air solenoids. They are for turning targets at our local shooting range.
It will need to drive the face solenoid for about second while timing for a preset but variable amount (2-30s hoping to set with pot).
When this timer has expired drive the away solenoid for about a second while timing for a variable but preset amount (again 2-30s hoping to adjust with a pot).
When the second time expires it goes back and starts the first time.
Robbing ideas from the original system, I was thinking about a monostable multivibrator for the timing (page5 fig 15 of datasheet variable resistors to rx1 and rx2):
http://uk.rs-online.com/web/search/...thod=searchProducts&searchTerm=cd4098&x=0&y=0
Using a darlington array to drive the solenoids using the notQ outputs from the above timer:
http://uk.rs-online.com/web/search/searchBrowseAction.html?method=getProduct&R=0527883
I was going to use 555 timers but this idea looks much better but I have little expierence of cmos circuits. Is there anything I should look out for or be careful of? other than electrostatic precautions?
I have 24 volts which is also used to drive the solenoids but dont have the solenoid details just yet.
I think thats all the details Ive been trying to think of the best way to do this for a while has anyone got a better idea?
cheers
Hannsg
